The 24 star "is happily dating Siobhan Bonnouvrier," who is the style director for Allure magazine, his rep tells PEOPLE in an exclusive statement.
"There is absolutely no truth to recent reports about Kiefer Sutherland reuniting with his ex-wife Kelly Winn," says the statement. "Mr. Sutherland and Ms. Winn have remained good friends since they separated in 1999."
Sutherland and Winn filed for divorce in 2004 after being separated for five years. Their divorce was finalized in 2008.